Question

Which scientist was the first to observe red blood cells in humans and other animals?
A. Robert Brown
B. Van Leeuwenhoek
C. Johannes Miller
D. Rudolf Virchow

Answer 1

Hint:-Cells are identified as the basic functional as well as structural unit that is enabled to undertake various different types of biochemical processes that are essential for maintaining life. The cells were discovered by various scientists both from the living as well as the nonliving matter.

Complete Answer:-
Cells are the basic units of which all the living organisms are made up of. The cell and its different structures are microscopic structures that are not visible through naked eyes. Cells contain a defined membrane which is known as the plasma membrane and the plasma membrane encloses the contents of the cell. The plasma membrane encloses the cytoplasm or the gel-like matrix which contains the different organelles.
The first observation of red blood cells in humans and other animals was done by Anton Van Leeuwenhoek. He used a self-designed single lensed microscope and was the first to experiment and identify different cells and even microbes. His observations laid the foundations for the different streams such as cytology and microbiology. He is also known as the father of microbiology.
Robert Brown was a paleobotanist and botanist and is credited with the important contributions through his works on the detailed descriptions of the cell nucleus and streaming movement of the cytoplasm. The distinct streaming movements of the cytoplasm are named as Brownian movements. He is also known for his works on plant pollination and fertilization.
Johannes Miller was an German theologist and writer.
Rudolf Virchow was a German pathologist, biologist as well as anthropologists and is regarded as the father of modern pathology. He is famous for his works on the cells and cellular pathology as well as identification of the cellular basis of certain diseases such as leukemia, thrombosis, chordoma etc. He coined the terms of several biological terms such as chromatin, parenchyma, amyloid degeneration etc.
Thus, the right option is B.

Note:- The cells are microscopic structures that are visible only through the use of proper microscopic apparatus. The red blood cells are the cells of the blood and as they contain the iron containing pigment hemoglobin. The first scientist that was able to observe the red blood cells in humans and other animals is Anton Van Leeuwenhoek. He is considered as the father of microbiology.